The Effect of Preparation Method on Ni/Ce/Al Catalyst for High Temperature Water-Gas Shift Reaction

Suntorn Sangsong; Kotchawan Srimala; Mia Radonjic; Sabaithip Tungkamani; Thana Sornchamni; Monrudee Phongaksorn

doi:10.4028/www.scientific.net/KEM.757.171

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The Effect of Preparation Method on Ni/Ce/Al Catalyst for High Temperature Water-Gas Shift Reaction
p.171

HomeKey Engineering MaterialsKey Engineering Materials Vol. 757The Effect of Preparation Method on Ni/Ce/Al...

The Effect of Preparation Method on Ni/Ce/Al Catalyst for High Temperature Water-Gas Shift Reaction

Abstract:

High temperature water gas shift (HT-WGS) is an important catalytic process connected with reforming process in hydrogen production. Ni/CeO₂-Al₂O₃ (or Al₂O₃) catalysts were studied in this work on the effect of catalyst preparation method toward the physicochemical properties and the HT-WGS activity. Ni/CeO₂-Al₂O₃were prepared by sol-gel and impregnation methods whereas Ni/Al₂O₃was prepared by impregnation method. The catalyst samples were characterized by XRD, H₂-TPR and H₂-TPD techniques. The catalytic activities of HT-WGS catalysts was demonstrated at 550°C, GHSV of 2x10⁵ mLh^-1gcat^-1and steam-to-CO ratio of 3. Nickel was detected as a nickel aluminate phase in the calcined catalyst. Ni strongly interacted with support in the calcined catalyst prepared by sol-gel method. The strong metal-support interaction can be resisted by preparing catalyst via impregnation and CeO₂ can promote the H₂O dissociation in HT-WGS mechanism. The highest metal dispersion, largest metal surface area and greatest HT-WGS activity were consequently achieved by Ni/CeO₂-Al₂O₃ prepared from impregnation method.

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Periodical:

Key Engineering Materials (Volume 757)

Pages:

171-175

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.757.171

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Online since:

October 2017

Authors:

Suntorn Sangsong, Kotchawan Srimala, Mia Radonjic, Sabaithip Tungkamani, Thana Sornchamni, Monrudee Phongaksorn*

Keywords:

Catalyst Preparation, High Temperature Water-Gas Shift Reaction, Ni⁄CeO₂-Al₂O₃

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